25210436442 has 16 divisors (see below), whose sum is σ = 50451321792. Its totient is φ = 8398404000.

The previous prime is 25210436437. The next prime is 25210436521. The reversal of 25210436442 is 24463401252.

It is a super-2 number, since 2×25210436442² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1257934 + ... + 1277817.

It is an arithmetic number, because the mean of its divisors is an integer number (3153207612).

Almost surely, 2^25210436442 is an apocalyptic number.

25210436442 is an abundant number, since it is smaller than the sum of its proper divisors (25240885350).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25210436442 is a wasteful number, since it uses less digits than its factorization.

25210436442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2537413.

The product of its (nonzero) digits is 46080, while the sum is 33.

Adding to 25210436442 its reverse (24463401252), we get a palindrome (49673837694).

The spelling of 25210436442 in words is "twenty-five billion, two hundred ten million, four hundred thirty-six thousand, four hundred forty-two".